This resource was prepared in response to a request for examples of developmental screening activities in Early Learning Challenge (ELC) States. This information will be helpful to States as they consider how to identify and address health, behavioral, and developmental needs of children with high needs. To address this request, ELC TA reviewed the "2015 Progress Update Report" for the 20 Phase 1, 2 and 3 ELC States and the "2016 Annual Performance Report" (APR) data from the Phase 2 and Phase 3 ELC States and the "2016 Final Performance Report" (FPR) data from the Phase 1 ELC States. These reports were submitted to the Departments of Education and Health and Human Services for review in the spring of 2017. Of the 20 ELC States, eight States (California, Delaware, Maryland, Michigan, New Jersey, North Carolina, Oregon, and Vermont) chose to address developmental screening as part of their overall State plan and reported on performance measure (C)(3)(d): "Leveraging Existing Resources (other than RTT-ELC funds") to Increase the Number of Children with High Needs who are Screened Using Developmental and Behavioral Screening Measures." Eight additional ELC States (Georgia, Illinois, Kentucky, Massachusetts, Minnesota, Ohio, Rhode Island, and Wisconsin) included information in their annual and final reports on their efforts to support developmental screening even though they did not specifically address performance measure (C)(3)(d) in their grant applications. This summary includes information about States' developmental screening activities in the following areas: professional development and staffing, legislation and licensing regulations, collaboration, data linkages electronic access to screenings and screening data, screening tools, referrals, marketing, and State Quality Rating and Improvement System (QRIS) components.